20306748
21
MLDV Series Gas Fireplace
VENTING INSTALLATION
•
Two sets of 45°elbows offsets may be used within the
vertical sections. From 0 to a maximum of 8' (2.5 m) of
vent pipe can be used between elbows.
Figure 31
•
Determine the roof pitch and use the appropriate starter
kit for offset installation.
•
The maximum angular variation allowed in the system
is 270°.
Figure 31
•
For the minimum height of the vent above the highest
point of penetration through the roof refer to Page 25,
Figure 35.
INSTALLATION FOR VERTICAL
TERMINATION
1. Determine the route your vertical venting will take. If
ceiling joist, roof rafters or other framing will obstruct
the venting system, consider an offset. Refer to
Figure
32
to avoid cutting load bearing members.
NOTE:
Pay special attention to these installation instructions
for required clearances (air space) to combustibles when
passing through ceilings, walls, roofs, enclosures, attic
rafters, etc. Do not pack air spaces with insulation. Also
note maximum vertical rise of the venting system and any
maximum horizontal offset limitations. Offsets must fall
within the parameters shown on
Page 17, Figure 13
.
Figure 32 -
Offset with Wall Strap and 45° Elbows
Roof
Flashing
Wall Strap
45° Elbows
Ceiling Firstop
FP1669
1
2
3
4
1
2
3
4
Figure 31 -
Maximum Elbow Usage
Example:
Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
FP1179
2. Set
fi
replace in desired location. Drop a plumb line down
from the ceiling to the position of the
fl
ue exit. Mark the
center point where the vent will penetrate the ceiling.
Drill a small locating hole at this point.
Drop a plumb line from the inside of the roof to the locat-
ing hole in the ceiling. Mark the center point where the
vent will penetrate the roof. Drill a small locating hole
at this point.
FLAT CEILING INSTALLATION
1. Cut a 10
1
⁄
2
" (267 mm) square hole in the ceiling using
the locating hole as a center point The opening should
be framed to 10
1
⁄
2
" x 10
1
⁄
2
" (267 x 267 mm) inside dimen-
sions as shown in
Figure 33
using framing lumber the
same size as the ceiling joist. If the area above the
ceiling is an insulated ceiling or a room, nail
fi
restop
from the top side. This prevents loose insulation from
falling into the required clearance space.
Figure 34.
